English (GB)
14
92 No-flow
A no-load situation has been detected in the
system.
See parameter group 22-2. A
93 Dry pump
A no-flow situation and high speed indicates that the
pump has run dry.
See parameter group 22-2. A
94 End of curve
Feedback stays lower than the setpoint, which may
indicate leakage in the pipe system.
See parameter group 22-5. A
95 Broken belt
Torque is below the torque level set for no-load,
indicating a broken belt.
See parameter group 22-6. A
96 Start delayed
Motor start is delayed due to active short-cycle
protection.
See parameter group 22-7. A
97 Stop delayed
Stopping the motor is delayed due to active short-
cycle protection.
See parameter group 22-7. W
98 Clock fault
The time is not set or RTC clock (if mounted) has
failed.
See parameter group 0-7. W
99 Locked rotor The rotor is blocked. Contact Grundfos Service. A
100 Derag limit fault The deragging feature failed during execution. Check the pump impeller for blockage. A
104 Mixing fan fault
The fan is not operating. The fan monitor checks
that the fan is spinning at power-up or whenever the
mixing fan is turned on. The mixing-fan fault can be
configured as a warning or an alarm trip in
parameter "14-53 Fan Monitor".
Cycle power to the drive to determine if the
warning or alarm returns.
W/A
148
System
temperature
One or more of the system temperature
measurements is too high.
Contact Grundfos Service. W/A
200 Fire mode
The drive is operating in fire mode. The warning
clears when fire mode is removed. Refer to the fire
mode data in the alarm log.
Contact Grundfos Service. W
201
Fire mode was
active
The drive has entered fire mode. Cycle power to the
unit to remove the warning. Refer to the fire mode
data in the alarm log.
Contact Grundfos Service. W
243 Brake IGBT
This alarm is only for multi-drive systems. It is
equivalent to alarm 27, Brake chopper fault.
• The DC fuse is blown.
• The brake jumper is not in position.
• The Klixon switch opened due to an
overtemperature condition in the brake resistor.
The report value in the alarm log indicates
which drive module generated the alarm:
1: Left drive module.
2: Second drive module from left.
3: Third drive module from left (in 4-module
systems).
4: Fourth drive module from left (in 4-module
systems).
A
244
Heat sink
temperature
The maximum temperature of the heat sink has
been exceeded. The temperature fault cannot reset
until the temperature drops below a defined heat
sink temperature.
The trip and reset points are different based on the
power size. This alarm is equivalent to alarm 29,
"Heat Sink Temp".
• Check the ambient temperature, it may be
too high.
• Check the length of the motor cables.
They may be too long.
• Incorrect airflow clearance above or
below the AC drive.
• Check for blocked airflow around the unit.
• Check to see if the heat sink fan is
damaged.
• Check if the heat sink is dirty.
A
245 Heat sink sensor
No feedback from the heat sink temperature sensor.
The signal from the IGBT thermal sensor is not
available on the power card. This alarm is
equivalent to alarm 39, Heat sink sensor.
The report value in the alarm log indicates which
drive module generated the alarm:
1: Left drive module.
2: Second drive module from left.
3: Third drive module from left (in 4-module
systems).
4: Fourth drive module from left (in 4-module
systems).
Check the following:
• Power card.
• Gate drive card.
• Ribbon cable between the power card and
the gate drive card.
A
Alarm
code
Description Cause Remedy Type
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